# [Example NextJS] The inferred type of 'default' cannot be named without a reference
bug: not sure what happened, just broke all of a sudden
👻 invalid⏮ needs reproduction
Error TS2742 when generating declaration types with trpc.router
wontfix🔎 needs more investigation/info
bug: SerializeObject<UndefinedToOptional<X>> is incompatible
👻 invalid⏮ needs reproduction
`inferProcedureInput` broken in published package
🐛 bug🧙🏻 typescript wizardry